Gas-engine.



B. M. ASLAKSQN.

GAR ENGINE.

PLCTION FILED JULYE). lUL LUMBO. Patented Dm 16,1913,

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B. M. ASLAKSN.

GAS ENGINE.

APPLIUM'luN llLEn JULYQ. 1mm

Patented Dec. 16, 1913.

B. M. ASLAKSON.

GAS ENGINE. AEPLIGATION rlLD JULY 9, 190s. f 1,081,460. l Patented Dee.16, 1913.

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GAS ENGINE.

AYPLIGATION 211.1111 JULY 9, 190e.

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GAS ENGXNB.

APPLICATION FILBDJULYQ, 190s.

Patented Dec. 16, 1913.

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APPLIUATIUN FILED JULYQ, 1908.

'Patented Ben. w, 1913.

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immun s Ff @WW1/Leones PATENT UFF-ICE BAXTER M. ASLAKSON, F SALEM,`OHIO.

GAL-:ENGINE noemen.

To all fic/rtm1. it *mit/y con/fern,

lle it known that l., lix'rnn M. .ASL.\KSON,

a citizen oi' the United States, and residing f county. Ohio, have at.Salem, (hilulnbiana A invented rei-tain new and uselul Improvements' in(ias-llngines, ot which the itollowing is a specification.

als

,fore the inlet port is closed.

My invention relates to gas engines of the two cycle type. and theobject ol? saine is to provide un engine comprising two cylinders whichmay be .sravenged by coinln'essed air and in which the charge isdelivered to the cylinders under ressure; to attain a high degree ofeconomy of fuel for a given power generated; andto provide an enginewithout valves. 1

A further object is to provide an engine having simple parts which areeasy to cast aand machine, and to construct the engine so thatthepistons will control the porte and cmnlpress the air to scavenge thecylinders, and col'npress the charge of gas forfthe cylinders.

A-further 'object vis to cause the piston which controls theA exhaustports, to move in advance of the other piston, so as to uncover theexhaust port before the inlet port is opened, and to close said'exhaustport befurther object isto provide crank chambers in which the air andgas charges may be. compressed, and to provide means' for filling t4space in said crank cases, so that a high compression of gas may beeliccted therein.

Referring to the drawings which forni a 5 part ofthiis specification,Figure 1, is a front etevationarlview of) my improved engine.

ot Fig. V2. Fig. 8,- is a detail view hand .cylinder of 'illlg. 2, is alongitudinal sectional view thereof. Fig. 3, is a longitudinal.sectional View through the cylinders and crank cases with the pistonsand cranks etc. removed. Fig. 41, is :a cross sectional View through thele'ft the engine and the crank case therefor. Fig. 5, is a plansectional view on .-linmA-A of Fig. 2. Fig. 6, 4is a plan sectional'View on line B-B .of Fig. 2.

Fig.- 7., is an inverted plan view on line C-C of a portionrods, anddiscloses the partition which separates the crank chambers, mounted be.-tween the wrietp'ins olfthe cranks. Fig. 9, ris aside. view of aptnjtion of one, of the cranks `Witlrits disk Weight .mounted thereon..llliig. 110, isfraaview ioiainioditled form.

Specification of Letters Patent. Application med .nay e, 190s.

at ented Der. l 6, 1 913. serien No. 442,643.

:hamber D', and projecting bearings D? and IJ, in which are locatedliners D* and D5 respectively. l

The upper halves of the bearings which lorm thecap portions, and areindicated by D and D", are duplicates of each other, and arre providedwith a flanged portion D8, and

' ari inwardly projecting portionDn which extends under the upperportion of the crank case.D By this arrangement the portions` D and D7are held more firmly in place, as will be readily understood, and by asingle pair of bolts at their outer ends. Each box is provided withanannular groove (Z, having an outlet on its under side to permitoverflow. of oil`to escape by proper pipes to a suitable receptacle. Thecrank case portion D1" is bolted to the hase portion l), by` passingbolts through their abutting flanges in the usual manner. ll is in turnbolted to the casting D1, and is provided with, a water chamber E whichis yclosed on its top by a cover F and its bot-tom by a` partition 1112.There are two cylinders formed in the castillo* Ylil indicated by E3 andll" respectively, uiliich are in open coni-- munieation with each otherat their upper ends by a' passage .E5 which forms a part of thecomlmstion 'chamber'.

G, indicates the position of the spark plug, and directly above same isa plug G, the opening in which it rests beingutilized to assist insupporting the lcore for the cylinders when the casting is being molded.Directly below the partition E2 in the cylinder E are ports E whichcommunicate with an annular chamber E7, which in turn is in opencommunication with a conduit .ES which leads through the casting D10 tothe crank chamber D, which is in o ien communication with thel underside of tlie piston H.

Directly below the partition E2 in cylinder E4 are ports E12 which arein open conimunication with a semiannular chamber El which leads totheexhaust port F14 of the engine. Located below theV ports E are ports Ewhich open into the' cylinder on one side and into a semiannular chamberE1,wl1ich ponmiunieates with the gafinlet which eonnnuncatezwith and isprovided with a The evlinder caetiner C E; 1,081,4sc

chamber D12 at one end and with a chamber E18 at the other end, andports E1 open ticient'oil to thoroughly llibricate the cylinthem 'to the,from chamber E18 into the cylinder E3;

E20 indicate inlet ports for air and are in open communication withinlet'lports E2l in the casing (see Figs. 1 and 6);v

The tops of the series of port's E6 a'nd E12 are nearly in alinementwith each other, and the ports E12 extend farther downward'than iorts E,and both series ,of ports are controlled by the-pistons H and l, aswellas the ports E1, and areopen when the pistons are in their lowestpositions in the cylinders, and als'o the ports E2* and E2 arecontrolled byl the pistons and are' open when the pistons are in theirhighest positions. Each piston is provided with a piston ring J whichover-runs the end of an oil passage through which oil may be carriedunder pressure, and which serves to carry aT film.

'of oil over the surface of the cylinders to Alubricate the samp. .ItWillbe noted that the wrist pins formed hollow and that they overrun" j,fends of the respective oil passages, so that the oil will ow through'posite sidespof the pistons, and the' cham rsVL serve? to carrysufders.v

Extending fromffths ;wrist pins of the) pistons are connectimgrrods Mand N ref spectively, which are connected to crank pins\ `O and Prespectively, ,which in turn are\ connected .together by extending thecrankpins to vform a portlon P- `as indicated in Figs. 2 and 8, or theymay j'be connected by forming double cranks as shown in Fi l0 andjoining them in line with theaxis of. the main shaft as shown at Q.

The crank-pin P which isconnected with the piston I which is the pistonwhich controls the exhaust port of the engine, is set about l0 degreesin advanceofthe crankpin O', so that in operation' the exhaust ports E12will be opened in advance of the inlet ports E6 and will be closed inadvance of same on the return strokes. B y which means the exhaust ofthe engine is more perfectly effected, and the new charge of fuel moreperfectly trapped in the cylinders. Mounted on the portion P2 of thecranks is a circular drum R which is made in two halves onehalf beingshown in the drawing to illustrate the inner construction, and isprovided with an opening R near one side, which lits` over said-portionP2, and each half is also provided 'with openings R2 throughwhich a boltis passed to hold the drum together and to the portion P2. The drum R ispreferably provided with a series of grooves R3 in itsperiphery, andclosely lits a cylindrical opening D12 formed in the Acrank-case betweenthe chambers D11 and D12, and serving as a partition to complete theformation of the said vlast named 'chambers. vThe grooiiesin the ldrumbecome tlled with oil from the crank .case and helpsto effect a completeclosure between the last mentioned chambers. In case the form of cranksshown in Fig. l0 were used, "the drum R would be formed with an openingat its center instead of eccentric, as shown in Fig. 2, as will bereadily understood.

The drum R is shown as having' a cham beizR formed therein, which may beincreased or decreased in size until the proper amount of metal is leftto properly balance the engine in running balance, when used inconnection with the balance disks S and v S', 'which also serve thefunction of filling up the space in the crank chambers so that a higherpressure of gas may be generated KI rin the said chambers than wouldotherwise be the case. The crank disks S and S are formed and securedtothe cranks as il1us trated in Figs. 9 and`l2, the central portion S2Vhavinga rectangular opening Ss which fits over the sides of the,crankas shown, and a steel band Sis shrunk o the periphery Aof disk S andserves tonhold the parts iirn1ly eid securely togetlyr.

The operation of the engine is as follows: Assuming the inlet E1 to beincommunicamixture, and the space .below the piston I filled with same,and the chamber and space below piston H tov be filledwith air which hasentered bv Way of ports E2u and inlets tion with a source of fas fuel ofproper E21, the pistons in making their downward I strokes would coverthe ports E and E29 and compress the respective gases in the chambersD11 and D, andsjnce these pressures are practically the same in bothchainbers, the gas in.one chamber will not iow past the 'partition R,Abut both gases will How through their respective conduits Es' and E17to the air inlet ports E8 and fuel' inlet ports EI?, and when the pistonH has passed ports EG the compressed air will flow through -c linders E3Aand E* and ou through ex aust'ports E, and immediatelyA thereafter thepiston H will uncover portsf E1? admitting the fuel charge to.thecyli`nder. Immediately thereafter the pistons rel verse theirdirection of` travel and the fuel l' iis supply is cut off atahout'thetime that the exhaust is closed, so that'nolfuel is lostthrough the exhaust, andthe c linders are trapped full of airand gas vuner pressurewhich-is further compressed by the upward stroke of thepistons, and ignited. On the downward stroke, the exhaivistrport'isopened. first by reason of the advance of the crankpin on this side,'andthis Givestime for the pressure to dropbefore t e airport E is opened,so that when it is opened, the air will flow rapidly through thecylinders to scavcnge same, and thus'permit a mixture tree from burnedgases, to be vcompressed on the following upward stroke ofthe pistons.

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somewhat earlier period of ignition may be ei'teeted without loss ofpower from what is commonly known as kicking back, and better economy isobtained by reason of this fact. Oil magy be used in the crank casechambers to serve as a lubricating means for the crank-pins and mainshaft bearings, and is thrown to the cylinders in the usual way as whensplash lubrication is used.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is,

1. A'gas engine comprising' a base forining the lower half of :i crankvchamber and havino` iro'ections formino bearinos caos ,fp Y n a providedwith flanged portion and inward -projections for said bearings, acasting provided with two chambers provided with openings in their lowerends suitably secured to said base and adapted to it over the inner endsoi said caps, and forming the upper halt' of the crank case a casingforining two cylinders having communication at their upper end suitably.secured'on said casting, one of said cylinders being provided with airinlet ports and the other cylinder with outlet ports Ain communicationwiththe atmosphere, and a gas inlet port in communication with thecompression chamber, a piston in each of said cylinders adapted tocontrol said-ports and compress air and gas respectively in saidchambersone of said pistons being arranged to begin its stroke inadvance of the other,substantially" as described. l

2. A gas engine comprising a base'forming the lower half of a crankchamber and provided with projections upon each side thereof, capssecured on said projections7 a lastiiig forming the upper half ot thecrank case and having a flange suitably secured to said base, a castinghaving two parallel cylinders formed therein, suitably secured upon saidfirst mentioned casting, said. cylinders being in open communicationwith each other respectively at their. upper ends and in communicationwith the crank chamber, one'of said cylinders being provided with inletports and the, other with outlet ports in communicationwith the workingchamber, the piston in each of said cylinders adapted to control'therespective ports, one of said pistons being arranged to begin its strokein advance of the other piston, crank pins suitably mounted insaid base,rods connecting said pistons with said crank pins, a drum c oiiiprisiugtwo halves rigidly secured together, mounted on oneof said crank pinsbetween said rod connections and provided with a series ot peripheralgrooves adapted to [it iii the chamber torined iii the base,substantially as described.

3. A gas engine comprising a casting hav-` ing a crankchamber, andprovided with pro-` jections forming bearings on opposite sides thereof,caps t'or said projections having in- `wardly projecting portions, acrank shaft mounted in said bearings, a crank case sel.cured upon saidfirst mentioned casting, and; ,a casing torinmg two cylinders suitablysecured upon said crank casing, said cylinders having communication at.their upper ends, one of said cylinders being' provided with inlet portsand the other with outlet ports in coiiiini'lnication with the crankchamber, pistons mounted in said cylinders, rods connect- `ing saidpistons with the crank shaft, a

drinn carried by 'aid crank shatft provided withl peripheral grooves andserving a partition within the crank case to form separate crankchambcrs,'as and for the purpose set forth. i

et. A gas engine comprising a base and casting forming a crank chamberand pro- 'vided with projecting bearing portions uponV opposite sidesthereof, caps forsaid projecting 'bearing portions provided withinwardly extending projections, a casing adapted to t over said inwardlyextendin projections, a main shaft mounted insai bearings, cranksmounted on said main shaft, a rotating drum having a series ofperipheral grooves mountedon said cranks `forming a separate crankchamber at each side thereof, a casting having two cylinders in opencommunication at their upper ends, and having cominunication at theirlower ends with the crank chamber, suitably secured on said crankcasing', a piston in each of said cylinders, and connecting rods eX-tending ironi said pistons to said cranks,'

substantially as described.

i, 5. A gas engine coinprising a base and casting forming a crankchamber therein and provided with projections upon opposite sides, saidilirojections ff'nfining bearings, a crank shaft mounted iii saidbearings, caps having ini'vard projections. 'tor said bearings, a crankcasing suitably secured upon said base casting, a casing forming twocylinders having comiiiuiiication at their upper ends and having'conununicatioii at theirlower end with the crank chamber and providedwith inlet and exhaust ports in communication with the atniosjihcre, apiston in cach of said cylinders, rods connecting said pistons with saidcrank shaft, a partition. cai'- ried by said crank shaft and forming twocrank chambers, a crank disk mounted on each of said cranks andcomprising an inner portion having an opening in which the crank rests,and anl outer band. adapted to hold the disk and band together, as andfor other with exhaust ports, said ports having their top edges inalinenient with each other, one' of said cylinders having gas inletports located immediately below said air inlet ports and each of saidcylinders having ports for admitting air and gas respectively thereto,from a source of supply, a piston in each of said cylinders adapted tooverrun said ports respectively and force the air and gas to one of saidcylinders, a crank located below each of said pistons, a connecting rodvconnecting each of said pistons with said crank respectively, a crankcasing, a drum provided with a series of peripheral grooves carried bysaid cranks, and dividing said crank casing into separate cranklchambers and means of communication between said crank chambers andsaid Working cylinders,- substantially as described..

7. ik gas engine comprising a casting having two cylinders *herein inopen communication at their upper ends, one of which is provided withinlet ports for air andthe other with exhaust ports, and having theirtop edges in alineinent with each other, one of said cylinders havinggas inlet ports located immediately below said air inlet ports -and eachof said cylinders having ports for admitting air and gas respectivelythereto,

troni a source of supply, a piston in each of 'said cylinders adapted tooverrun said ports respectively and force the air and gas to one of saidcylinders, a crank located below each of said pistons, a connecting rodconnecting each of said pistons with said crank respectively, a crankcasing, ai id a drum carried by said cranks and dividingsaid crankcasing into separate crank chambers, substantially as described.

8. A gas engine comprising a casting having two cylinders therein in'open communication at their upper ends, one of which is provided withinlet ports for air and the other with exhaust ports, and having theirtop edges in alinement with each other, one

of said cylinders having gas inlet ports located immediately below saidair inlet ports and each of said cylinders having ports vfor admittingair and gas respectively thereto from a source of supply', a piston ineach o said cylinders adapted to overrun said ports respectively andforce the air and gas to one of said cylinders, a crank located beloweach of said pistons, one of which is arran ed in advance of the other,a connecting ro connecting each of said pistons with said crankrespectively, a crank casing, and a drum carried by said cranks anddividing said crank casing into separate crank chambers, substantiallyas described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing-witnesses, this tenth day of January, 1908.

A BAXTER M.ASLAKSON. Witnesses:

FRANK M. ASHLEY, A. T. Sciianrsr

